Start a hangout

## Profile

John G

111,864 views

AboutPosts

## Stream

### John G

Shared publicly -Internet Everywhere - Full Program

From social upheaval and ever-shifting privacy standards to self-driving cars and networked groceries, this eye-opening program provides a stunning glimpse of what’s around the corner for the Internet.

From social upheaval and ever-shifting privacy standards to self-driving cars and networked groceries, this eye-opening program provides a stunning glimpse of what’s around the corner for the Internet.

1

### John G

Shared publicly -Fancy working at +Ordnance Survey as manger of 'technology labs' where you'll be leading an efficient prototyping and proof of concept service mainly in the area of web and mobile platforms, and APIs

https://ordnancesurvey.csod.com/ats/careersite/JobDetails.aspx?id=150

https://ordnancesurvey.csod.com/ats/careersite/JobDetails.aspx?id=150

3

1

### John G

commented on a video on YouTube.works very nicely for areas of administrative regions (wards, counties etc.) in GB: https://johngoodwin225.wordpress.com/2014/07/13/benfords-law-and-the-administrative-geography-of-great-britain/

1

### John G

Shared publicly -playing with the new Cayley graph DB from Google and trying it out with the +Ordnance Survey linked data - so far so easy. Will blog about it later.

2

6 comments

+John G sorry for replying late. I have played around with gremlin. I am a fan of sparql but would would surely have a look....by the way ur blog post was a great start with caley....i have reahared it

### John G

Shared publicly -lots of interesting vacancies at +Ordnance Survey - including lots my connections would be interested in such as chief geospatial scientist, principal scientist, Senior Geographical Information Architect, product manager for APIs http://lnkd.in/dfanK27

1

### John G

Shared publicly -dodgy bunch those mathematicians...

4

3 comments

Michael Beckett

+

1

2

1

2

1

Sin and Cosin

### John G

Shared publicly -Just listened to the latest episode of the Infinite Monkey Cage, and was reminded of Benford’s Law. This states:

Benford’s Law, also called the First-Digit Law, refers to the frequency distribution of digits in many (but not all) real-life sources of data. In this distribution, the number 1 occurs as the leading digit about 30% of the time, while larger numbers occur in that position less frequently: 9 as the first digit less than 5% of the time. Benford’s Law also concerns the expected distribution for digits beyond the first, which approach a uniform distribution.

I was curious if that might emerge in geography (or Ordnance Survey data) somehow. Turns out if we look at the areas (in metres squared) of the polygons in the Boundary Line Product (which talks about counties, wards, consistuencies) etc. then we get a pretty good fit. In the table below the first column is the leading digit of the polygon area, the second is the percentage of areas starting with that leading digit and the third column is the value Benford’s Law predicts:

1: 30.6 30.1

2: 15.9 17.6

3: 11.3 12.5

4: 9.8 9.7

5: 8 7.9

6: 7.3 6.7

7: 6.3 5.8

8: 5.6 5.1

9: 4.9 4.6

Benford’s Law, also called the First-Digit Law, refers to the frequency distribution of digits in many (but not all) real-life sources of data. In this distribution, the number 1 occurs as the leading digit about 30% of the time, while larger numbers occur in that position less frequently: 9 as the first digit less than 5% of the time. Benford’s Law also concerns the expected distribution for digits beyond the first, which approach a uniform distribution.

I was curious if that might emerge in geography (or Ordnance Survey data) somehow. Turns out if we look at the areas (in metres squared) of the polygons in the Boundary Line Product (which talks about counties, wards, consistuencies) etc. then we get a pretty good fit. In the table below the first column is the leading digit of the polygon area, the second is the percentage of areas starting with that leading digit and the third column is the value Benford’s Law predicts:

1: 30.6 30.1

2: 15.9 17.6

3: 11.3 12.5

4: 9.8 9.7

5: 8 7.9

6: 7.3 6.7

7: 6.3 5.8

8: 5.6 5.1

9: 4.9 4.6

2

### John G

Shared publicly -Some very quick thoughts on exploring Ordnance Survey linked data in Cayley Graph https://johngoodwin225.wordpress.com/2014/06/29/quick-play-with-cayley-graph-db-and-ordnance-survey-linked-data/

Earlier this month Google announced the release of the open source graph database/triplestore Cayley. This weekend I thought I would have a quick look at it, and try some simple queries using the O...

1

### John G

Shared publicly -Datashine - nice application of Ordnance Survey open data from CASA UCL http://lnkd.in/dyXvxXe http://lnkd.in/dJXdwpX

DataShine is a toolkit for creating web maps for showing geographical data that has been collated and analysed by the BODMAS project, based at UCL's Centre for Advanced Spatial Analysis, such as the 2011 Census data included in DataShine: Census that we have released today.

5

Would have been a good contender for the OS OpenData Award too.